Many property keys used to work with the SMTP properties contain a typo. They are written sm*PT* insted of sm*TP*.
FAILURE: Integrated in
inspectIT - Integration #224
INSPECTIT-2264: SMTP property keys contain a typo (ivan.senic: 36797656388181b9a86fa13b1566070e049b137e)
(edit) inspectit.server/src/main/java/rocks/inspectit/server/mail/EMailSender.java
(edit) inspectit.server/src/main/external-resources/config/default.xml